衢州市甲型H1N1流感流行特征及防控效果评价

Epidemiological characteristics and prevention of novel influenza A(H1N1) in Quzhou city

目的分析衢州市甲型H1N1流感(以下简称甲流)的流行特征及监测情况,为科学防控提供依据。方法收集衢州市2009年甲流疫情资料及监测资料,用Excel 2003和SPSS 13.0对所有数据进行整理和分析。率的比较采用卡方检验,P<0.05差异有统计学意义。结果衢州市2009年共报告甲流238例,其中重症16例、危重6例,无死亡病例报告。238例甲流病例中,累计住院治疗61例,占所有报告病例的25.63%。柯城区报告病例数占所有报告病例数的73.53%,发病时间先上升后下降,以11月份报告病例数最多,发病人群主要是学生,占所有报告发病数的61.34%,无医务人员感染。监测结果显示,衢州市流感样病例(ILI)的阳性率为59.18%,甲流占所有阳性结果的61.80%。结论前期围堵为甲流防控争取了时间,今后还应加强疫情监测的强度和分析的深度,将甲流疫苗接种列入计划免疫,适时调整防控措施。

Objective To analyze the epidemiological characteristics of novel influenza A(H1N1),and evaluate prevention measures for the disease control.Methods Epidemic reports and surveillance data of 2009 H1N1 influenza were collected by disease reporting information system in Quzhou city.Statistical analysis was performed with Excel 2003 and SPSS 13.0.Results 238 H1N1 influenza cases had been reported in Quzhou,including 16 severe and 6 critical cases.There was no H1N1 influenza associated mortality case confirmed in 2009,although 61 cases(25.63%) required hospitalized treatment.Kecheng District reported 73.53% of the cases.Most cases were reported in November.Students accounted for 61.34% of H1N1 cases for the period and no infection occurred among health care professionals.The positive proportion of influenza was 59.18%(377/637) for influenza suspect surveillance specimens and 61.80%(233/377) of influenza confirmed cases were H1N1 infection.Conclusion The early viral isolation and confirmation helped the prevention and control of 2009 H1N1 influenza.The joint efforts of quarantine of early cases,vaccination of high risk population,and dynamic observation of epidemic situation were effective in fighting against the challenge of the new emerging influenza strain.